In a statement to customers, Trader Joe's said no one has reported getting sick from eating the pizzas. "We sincerely apologize for the inconvenience," the upscale grocer said in its statement.

Wheat is one of the top foods that cause allergic reactions, along with milk, eggs, peanuts, nuts and shellfish. Food allergies cause 2,000 hospitalizations and 150 deaths each year, said the U.S. Centers for Disease Control.Included in the recall are frozen 10-ounce packages of Trader Joe's Pizza Al Pollo Asado. Each package has EST. P-974 inside the USDA inspection mark. The pizzas were made by Completely Fresh Foods Inc. between Jan. 27 and Sunday and shipped to Trader Joe's stores nationwide. The USDA lists the Julian dates affected by the recall.

A FSIS inspector reviewed the spice blend and spotted that wheat was listed as an ingredient in the blend, but not listed on the pizza package. The USDA listed the health risk as "low" but encouraged consumers to contact their doctors if worried about possible allergic reactions.

Consumers can return the pizzas to any Trader Joe's for a refund, according to the grocer. Contact Trader Joe's at (626) 599-3817. Just last month, Trader Joe's recalled its Chocolate Chip Chewy Coated Granola Bars because of possible salmonella contamination.